Electrode as used for welding purposes.



M. M. IRVINE ELECTRODE AS USED FOR WELDING PURPOSES APPLICATION FILED SEPTJZ. I9II.

1,261,395. Patented Apr. 2,1918.

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UNITED snares PATENT ornron M ALG OJLM M. IRVINE. OF GLASGOW, SCOTLAND.

ELEGTRODE AS USED FOR WELDING PURPGS'ES.

Application filed September 17, 1917.

To all whom it may concern:

Be it known that I, MALCOLM MILLER IRVINE, a subject of the King of Great Britain, residing at Glasgow, Scotland, have invented certain new and useful Improvements Relating to Electrodes as Used for Welding Purposes, of which the following is a specification. I

The object of the present invention is to provide a tube of asbestos paper or pulp which is treated with iron, preferably in the form of an oxid and saturated with sodium carbonate and sodium silicate so as to give it distinctive properties when applied to a metal rod or electrode as used in electric welding. The tubes may be made up separately and fitted on or to the rods when required or they may be formed or molded.

directly upon the rods used in welding.

The tubes are, preferably, made as follows, namely :A layer or strip of asbestos paper suflicient to cover the required electrode is treated with appropriate quantities of iron oxid, sodium carbonate, and sodium silicate, and wound concentrically or spirally upon a metal rod or wire of standard gage or upon the actual welding wire.

In the treatment of the paper I, preferably, use the ingredients in or about the following proportions by weight, namely :To every 100 parts of asbestos I add Iron oxid 5 parts Sodium carbonate--- 5 parts Sodium silicate 90 parts 100 parts In some cases in lieu of iron oxidfieduced iron in the form of a powder may be used.

It is to be understood the above proportions are merely given by way of example and they may, of course, be varied more or less as desired.

In some cases I may use asbestos pulp treated with the same ingredients as the paper after molding it into the form of a tube.

In order that the invention may be properly understood I have hereunto appended an explanatory drawing whereon I have, by way of example, shown an electrode pro, vided with one of my flux tu es, I

Specification of Letters Patent.

Patented Apr. 2, 1918.

Serial No. 191,813.

Figure l is a side elevation of the electrad and Fig. 2 a cross section thereof- The electrode shown on the drawing consists of a welding wire a upon which is concentrically wound a piece of the treated asbestos paper I) of suitable width and length.

Of course, instead of winding the paper concentrically into cylindrical form, as shown, it might be wound spirally. In this case I would use a long narrow strip of the treated asbestos paper and Wind it spirally around about the wire.

0 The method of treating the asbestos paper is preferably as follows :The asbestos paper is cut of such a width as to give, when rolled on the molding wire, a thickness of from 1 to 2 mm. The sodium carbonate and sodium silicate are dissolved in half their weight of hot water and mixed with the iron oxid. This mixture is then painted with a brush on to the asbestos. The liquid is absorbed while the iron oxid remains on the surface. or gummed so that the strip will adhere when applied to the wire. Alternatively the strip may be gummed to the wire and afterward dipped in the hot solution containing the sodium carbonate, sodium silicate and iron oxid. The coated wire is then heated strongly to expel the water and destroy the paste. If the tube only is required it is removed by gripping it firmly in a suitable clamp and withdrawing the mandrel. In the case of an electrode the coating is dried in situ.

The electrode provided with the flux tube .or coated in the manner before described The reverse side is then pasted terruption of the primary are by the dropping of the metal, continuity of arc is maintained by the'external ring of metal. In this way a steady arc is insured so that a maximum welding speed may be. attained while the light emitted from the are is yel what I claim and The electrode itself may be constituted by any special wire suited to the nature of the work.

The double are makes it possible to obtain good welding results with alternating current and allows of greater latitude in the amount of current used so that the heat put into the work is more easily regulated.

Having now full described my invention d esire to secure by Letters Patent is:-

1. A tube, for use in electric welding composed of asbestos paper or pulp treated with iron (preferably in the form of an oxid) and saturated with sodium carbonate and sodium silicate, substantiall as described.

2. A tube, such as claimetf in claim 1, having the iron as an external coatin 3. An electrode for use in electrlc welding consistingJ of a metallic rod having thereon a flux tu e composed of asbestos paper or ulp treated with iron (preferably in the 01m of an oxid,) sodium carbonate and sodium silicate, substantiall as described.

In testimon whereof I a my signature in presence 0 two witnesses.

MALCOLM M. IRVINE.

Witnesses:

HUGH D. Frrzm'rmox, WILLIAM GALL. 

